⭕Wednesday's earthquake was New Jersey's 181st aftershock since the initial April quake

⭕It was the strongest aftershock since May

⭕Aftershocks can occur years after the initial quake


 

Seismic activity has fired up again in New Jersey, following the earthquake that rattled the state back in April.

The U.S. Geological Survey reported a magnitude 2.2 earthquake centered east of Califon at 1:44 a.m. Wednesday. Reports of those feeling it are coming mostly from Hunterdon and Somerset counties.

A USGS map shows the epicenter along Apple Lane off Old Turnpike Road (County Route 517).

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Map shows epicenter of earthquake 7/31/24
Map shows epicenter of earthquake 7/31/24 (USGS)
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How long do aftershocks last?

New Jersey 101.5 Chief Meteorologist Dan Zarrow said that earthquakes less than a magnitude of 3.0 are rarely felt by humans and cause little damage.

It is the 181st aftershock from the April 5 earthquake. It is the strongest since May 24 when a magnitude 2.9 earthquake was centered in the same area.  The April 5 earthquake was a magnitude 4.8 and the state's stongest since 1884.

“Aftershocks can continue over weeks, months, or years. In general, the larger the mainshock, the larger and more numerous the aftershocks, and the longer they will continue,” USGS Steve Sobie told New Jersey 101.5 after an aftershock in May.

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